Pharyngeal Apparatus 1 •Pharyngeal arches are rod-like thickenings of mesoderm present in the wall of the foregut. •The ventral ends of the arches of the right and left sides meet in the middle line in the floor of the pharynx. •In the interval between any two arches, the endoderm (lining the pharynx) is pushed outwards to form a series of pouches - endodermal, or pharyngeal, pouches. •They are evident in the head and neck region by 4th week •Resemble fish gills (branchia) thus their earlier name .Branchial apparatus - derived from the Greek word branchia or gill •They are derived from neural crest cells

The Skeleton • Consists of–Bones, cartilage, joints, and ligaments • Composed of 206 named bones: two divisions–Axial skeleton (80 bones)–Appendicular skeleton (126 bones)

INTRODUCTION • The integumentary system consists of: – the skin – and its appendages: • sweat glands, • nails, • hairs, • sebaceous glands, • arrector muscles of hairs (arrector pili muscles), • mammary glands, • teeth

DEVELOPMENT OF THE CHORIONIC SAC • Trophoblast layer of the blastocyst • Differentiation into: – Cytotrophoblast – inner layer – Syncytiotrophoblast – outer layer • Development of extraembryonic mesoderm • Formation of isolated lacunae spaces which later coalesce to form one big extraembryonic cavity – renamed chorionic sac • Chorionic sac surrounds the amniotic cavity and primary umbilical vesicle • Expansion of chorionic sac reduces the size of umbilical vesicle

Fetal membranes are membranous/auxiliary structures that surround or associated with vertebrate embryo but do NOT take part in final embryo formation. Include: 1-Amnion. 2-Yolk sac. 3-Allantois. 4-Connecting stalk and umbilical cord. 5-Chorion

Definition and classification Cells Tissue responsible for support, connects or separates different types of tissues and organs Composition Extracellular matrix (abundant) Protein fibres Amorphous ground substance Tissue fluid (constant)

Face: The main development of the face occurs between the 4th and 8th weeks. Facial primordium Early in the 4th week, face is represented by an area around the mouth bounded cranially by the neural plate, caudally by the pericardial bulge and laterally by the mandibular precess of 1st pharyngeal arches. Facial development is induced by brain vesicles. Facial prominences In week 4 five facial prominences appear around stomodeum:-Single frontonasal prominence (FNP) above the stomodeum.-Paired maxillary prominences (Mx P) lateral to stomodeum.-Paired mandibular prominences (Md P) below stomodeum. The paired prominences are derivatives of the first pair of pharyngeal arches

This document provides an overview of cooperative philosophy and defines both informal and formal forms of cooperation. It discusses that cooperation has traditionally been practiced among communities for survival against natural threats, with loose associations and verbal rules.

Download a copy of the KJSEA ISLAMIC RELIGIOUS EDUCATION SAMPLE PAPER. This is a very vital resource for your preparation for the fourth coming KJSEA NATIONAL EXAMINATION. Grab a copy today!

The course introduces the philosophical and epistemological aspects of research. It emphasizes the relevance of methodology for the study of and research in political sciences. Courses cover a wide range of issues from the philosophy of science and epistemology, through the nature and processes of science and the social sciences, history of political science and its status as a science, questions of theory and causation and how we study political science as a science. The following topics will be covered; the factors to consider in selecting a research topic in political science; topic formulation; research proposal writing; the conceptual foundation of research; literature review, significance and approaches; research design; target population, meaning, significance and how to select the research target population; meaning, significance of sample size and sampling techniques; data collection instruments and how to select appropriate ones; data presentation; the meaning and significance of data analysis; data analysis techniques. Further emphasis on explanation and prediction in social science and inter-paradigm debate in political science are elucidated.

Etymological definition The term “philosophy” is derived from a combination of two Greek words, namely philia (love) and Sophia (wisdom) meaning “love of wisdom.” You may therefore, define philosophy as “love of wisdom.” This definition has persisted for more than two thousand years. It is said that the first one to call himself a philosopher was Pythagoras, a Greek who lived somewhere between 570 and 495 B.C.E. and spent most of his life in southern Italy. He is of course known by his famous mathematical theorem. When once asked if he was wise, he replied that no one could be wise but a god, but that he was a lover of wisdom. To love something does not mean to possess it but to focus our life on it. Whereas Pythagoras introduced the term philosopher, it was Socrates who made it famous. For Socrates (467- 399 B.C.), love of wisdom entails the pursuit of truth and nothing but objective truth. He said that the philosopher was one who had a passion for wisdom and who was intoxicated by this love. For Plato (427-347, it is gaining the vision of absolute ideas, that is, one must be able to discover what the character of universal reality is. Aristotle (384-322), a follower of Plato reinforces the view when he stated that philosophy is the investigation of all things, which takes into account logical rules in the determination of the true nature of reality.

Biochemistry is the study of the chemical processes occurring in living organisms. Biochemistry is concerned with structures and properties of biomolecules found in living systems in order to understand structure-function relationships. In addition, biochemistry is concerned with chemical transformations of biomolecules, and the energy changes associated with these transformations. These chemical transformations are collectively referred to as metabolism.

Biomolecules are the primary building blocks of every living organism. Together, they promote different biological processes, which are necessary for life. They vary in structures and sizes. Biomolecules primarily consist of carbon, hydrogen and oxygen.

The document discusses phonetic and phonological analysis. It begins by explaining the three dimensions used to analyze speech sounds: 1) air stream mechanisms, 2) vocal tract, and 3) vocal organs. It then discusses the central pool of human speech sounds

The document provides an introduction to management, discussing its definition, characteristics, levels, and key functions including planning, organizing, staffing, directing and controlling. It defines management as getting things done through others and outlines that it is a universal, purposeful, integrative and continuous process.

An invertebrate is any animal without an internal backbone which includes animals such as insects, crustaceans, worms, jellyfish and sponges. The diversity of invertebrate species far outnumbers that of the vertebrate animals. One group of invertebrates called Arthropods, which includes insects, spiders and crustaceans, contains almost 80% of all animal species. The remaining invertebrates constitute between 12-15% of all animal species.

This unit is intended to introduce learners to the animal kingdom, and to acquire knowledge and skills in lower animals, their evolution and structural adaptations.

The term taxonomy is used when referring specifically to the process of naming. Nomenclature refers to the actual names or word structure used in names. The naming system, or classification system, employed in biology involves a series of categories in a hierarchy so that each level includes several sublevels.

The document contains a series of KNEC PAST PAPERS ON CONTROL AND ENGINEERING SURVEY. This is an ideal resource for purposes of your final exam preparations. Get a copy today and prepare adequately!

Course Outline; Introduction. Horizontal Control; traverse observation, calculation and adjustment. Vertical control: Levelling and contouring. Applications in highway drainage and setting out works. Area and volumes. Mass haul diagram. Practicals: field surveying.